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Mazda
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2003
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MPV ES
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self-Diagnostics
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Diagnostic Tests
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DTC P0118: Engine Coolant Temperature Sensor - High Input
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Possible Causes
Possible Causes
ECT sensor malfunction.
Faulty connection at ECT sensor or PCM harness connector.
Open circuit between ECT sensor and PCM harness connectors.
PCM malfunction.
Short to power between ECT sensor and PCM harness connectors.